Answer
$\dot{W}_i=7.03\ kW$
Work Step by Step
$\dot{Q}_{H,net}=85000-4000=81000\ kJ/h$
$COP_{HP}=\dot{Q}_H/\dot{W}_i=3.2$
$\dot{W}_i=7.03\ kW$
Thermodynamics: An Engineering Approach 8th Edition
by Cengel, Yunus; Boles, Michael
Published by
McGraw-Hill Education
ISBN 10:
0-07339-817-9
ISBN 13:
978-0-07339-817-4
Chapter 6 - The Second Law of Thermodynamics - Problems - Page 315: 6-49
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